Скачать или смотреть P1131 Code: O2 Sensor Indicates Lean Condition (Bank 1) – Causes & Diagnosis

P1131 code: Lack of Upstream Heated Oxygen Sensor Switch – Sensor Indicates Lean (Bank 1). This code often means the engine is running lean due to issues like a vacuum leak, faulty O2 sensor, dirty MAF sensor, or fuel delivery problems. We’ll show you the common symptoms, how to begin diagnosing the problem, and what might be involved in fixing it. This content is for educational purposes only and is not a substitute for professional repair advice. Always consult a certified technician for proper diagnostics and repair. Understanding the P1131 code can help you avoid bigger engine issues and get your vehicle running right again.

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